Strip pretreatment equipment

Abstract

The utility model relates to the technical field of battery production, and discloses strip pretreatment equipment. The strip pretreatment equipment comprises an unwinding device, a preheating device, a constant-temperature heating and conveying device, a cooling device, a winding device and a vacuum device, wherein the unwinding device comprises an unwinding cavity; the preheating device comprises a preheating chamber and a preheating piece; the constant-temperature heating and conveying device comprises a constant-temperature belt conveying chamber and a constant-temperature heating piece; the cooling device comprises a cooling chamber and a cooling piece; the winding device comprises a winding cavity; and the vacuum device is used for vacuumizing. The strip pretreatment equipment provided by the utility model adopts a roll material unfolding and baking technology, through uncoiling, preheating, constant-temperature heating and conveying, cooling and coiling treatment, the baking environment of each point on a strip is consistent, the consistency of moisture and thickness of the strip is more advantageous, the whole baking process is carried out in a vacuum environment, the moisture of the strip is easier to desorb, and the quality of the strip is improved. And the baking efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of battery production technology, and specifically to a strip pretreatment device. Background Technology

[0002] Researchers have discovered that moisture has a significant impact on the performance of lithium-ion batteries; excessive water content can severely affect the battery's electrochemical performance. The moisture content in the electrodes directly affects the capacity, impedance, cycle characteristics, lifespan, and safety of lithium-ion batteries. Therefore, it is necessary to control the moisture content of the electrodes by baking them.

[0003] In response, Chinese invention patent CN113028745A discloses a method for baking moisture in lithium-ion battery positive electrode rolls. This baking process includes the following steps: the electrode rolls are placed in an oven for heating and vacuuming; the oven temperature is adjusted to 90-100℃, nitrogen gas is introduced and adjusted to atmospheric pressure, and baking is performed for 150-200 minutes; the oven is vacuumed to 200-300 Pa at intervals of 20-30 minutes and maintained at 90-100℃ for 100-150 minutes; the oven is vacuumed to 60-100 Pa, temperature is maintained at 90-100℃, and baking is performed for 200-250 minutes; the oven is vacuumed to 20-40 Pa, temperature is maintained at 90-100℃, and baking is performed for 200-250 minutes; ambient temperature nitrogen gas is circulated through the oven, heating is stopped, and the oven is cooled. This baking process can improve the deformation of the electrode roll during baking and the pass rate of electrode die-cutting. However, it adopts a static exhalation method of heating-(vacuuming-replenishing working gas) circulation-cooling, which takes a long time to dry the electrode. In addition, under this baking method, the whole roll is not unfolded, and the remaining moisture and mechanical properties of the electrode are inconsistent. Utility Model Content

[0004] To address the technical problems of low baking efficiency, inconsistent residual moisture content, and inconsistent mechanical properties of strips in current strip baking methods, this utility model provides a strip pretreatment device.

[0005] This utility model provides a strip pretreatment device, comprising:

[0006] An unwinding device, including an unwinding chamber capable of drawing out the strip;

[0007] The preheating device includes a preheating chamber through which the strip can pass and a preheating element disposed within the preheating chamber;

[0008] The constant temperature heating conveyor includes a constant temperature conveying chamber through which the strip can pass and a constant temperature heating element disposed in the constant temperature conveying chamber;

[0009] A cooling device, comprising a cooling chamber through which a strip can pass and a cooling element disposed within the cooling chamber;

[0010] A winding device, including a winding chamber for introducing strip; and

[0011] A vacuum device is used to evacuate the unwinding chamber, preheating chamber, constant temperature conveyor chamber, cooling chamber, and winding chamber.

[0012] Optionally, the strip pretreatment equipment further includes a cryogenic device for condensing and adsorbing the unwinding chamber, cooling chamber, and / or winding chamber.

[0013] Optionally, the cryogenic device includes a refrigeration coil and a cryogenic acquisition mechanism, the refrigeration coil being wound inside the unwinding chamber, the cooling chamber, and / or the winding chamber, and the cryogenic acquisition mechanism including a cryogenic pump connected to the refrigeration coil.

[0014] Optionally, the cryogenic device further includes a heating defrosting mechanism connected to the refrigeration coil.

[0015] Optionally, the strip pretreatment equipment further includes a working gas replacement device for supplying working gas toward the constant temperature conveying chamber.

[0016] Optionally, the preheating element includes an infrared radiation element disposed in the preheating chamber, and the travel path of the strip conveyed into the preheating chamber bypasses the infrared radiation element.

[0017] Optionally, the infrared radiating elements are in at least one group, and each group consists of two infrared radiating elements. The two infrared radiating elements are spaced apart along the vertical direction, and the strip can rotate around the two infrared radiating elements in the same group.

[0018] Optionally, the constant temperature heating element includes multiple constant temperature heating rollers rotatably disposed in the constant temperature conveyor chamber, and the strip passes around the multiple constant temperature heating rollers in sequence.

[0019] Optionally, there are multiple constant temperature conveyor chambers arranged in parallel, and each constant temperature conveyor chamber is provided with multiple constant temperature heating rollers.

[0020] Optionally, the constant temperature conveyor chamber is provided with two constant temperature heating rollers, which are spaced apart along the vertical direction, and the strip is folded back around the two constant temperature heating rollers.

[0021] Optionally, the constant temperature conveyor belt chamber is further provided with a heat energy directional reflection device, which includes a heat energy reflector plate, and the heat energy reflector plate is arranged opposite to the constant temperature heating roller.

[0022] Optionally, the cooling component includes two drive mechanisms and cooling rollers respectively disposed on the two drive mechanisms, with a gap formed between the two cooling rollers for the strip to pass through, and the two drive mechanisms being able to drive the two cooling rollers closer to or further away from each other.

[0023] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0024] The strip pretreatment equipment provided by this utility model adopts roll unfolding and baking technology. After unwinding, preheating, constant temperature heating and conveying, cooling and rewinding, the baking environment of each point on the strip is consistent, which is more advantageous for the consistency of the strip's moisture and thickness, and improves the consistency of the strip's mechanical properties. Moreover, the entire baking process is carried out in a vacuum environment, which makes it easier for the strip's moisture to be desorbed. The equipment occupies little space and has low energy consumption. The baking time of a single roll can be shortened to less than 30 seconds, which greatly improves the baking efficiency. At the same time, it avoids the problems of metal foil oxidation and strip expansion and wrinkling caused by long-term strip baking, improves the production yield and reduces production energy consumption. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the strip pretreatment equipment described in this embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the constant temperature heating and conveying device described in the embodiment of this utility model;

[0029] Figure 3 This is a cross-sectional view of the constant temperature heating and conveying device described in the embodiment of this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the constant temperature heating element according to an embodiment of the present utility model;

[0031] Figure 5 This is a schematic diagram of the cooling device described in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures

[0033] 1. Vacuum acquisition mechanism; 11. Low temperature acquisition mechanism; 12. Vacuum extraction port; 13. Vacuum breaking port; 2. Unwinding device; 21. Unwinding chamber; 22. Unwinding shaft; 3. Preheating device; 31. Preheating chamber; 32. Preheating component; 321. Infrared radiation element; 33. Preheating roller; 4. Constant temperature heating and conveying device; 41. Constant temperature conveying chamber; 42. Constant temperature heating component; 421. Constant temperature heating roller; 43. Heating roller; 44. Working gas replacement port; 45. Thermal energy directional reflection device; 451. Thermal energy reflector; 5. Cooling device; 51. Cooling chamber; 52. Cooling component; 521. Cooling pressure roller; 522. Drive mechanism; 6. Rewinding device; 61. Rewinding chamber; 62. Rewinding shaft; 7. Strip; 8. Deep cooling device. Detailed Implementation

[0034] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments and features of this utility model can be combined with each other.

[0035] The following description sets forth many specific details to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments described in the specification are only some embodiments of the present invention, and not all embodiments.

[0036] Combination Figures 1 to 5 As shown, the strip pretreatment equipment provided in this embodiment of the utility model includes an unwinding device 2, a preheating device 3, a constant temperature heating and conveying device 4, a cooling device 5, a winding device 6, and a vacuum device.

[0037] The unwinding device 2 includes an unwinding chamber 21 for leading out the strip 7 and an unwinding shaft 22 rotatably disposed within the unwinding chamber 21. The strip can be fitted around the outer circumference of the unwinding shaft 22, and the strip is unwound as the unwinding shaft 22 rotates. The preheating device 3 includes a preheating chamber 31 through which the strip 7 can pass and a preheating element 32 disposed within the preheating chamber 31. That is, the strip 7 unwound by the unwinding device 2 can enter the preheating chamber 31 and be preheated by the preheating element 32 within the preheating chamber 31, wherein the preheating temperature is room temperature - 260°C. The preheated strip 7 can be led out through the preheating chamber 31. The constant temperature heating and conveying device 4 includes a constant temperature conveying chamber 41 through which the strip 7 can pass and a constant temperature heating element 42 disposed within the constant temperature conveying chamber 41. The strip 7, drawn out by the preheating device 3, enters the constant-temperature conveyor chamber 41 and is heated at a constant temperature by the constant-temperature heating element 42 within the chamber 41. The constant-temperature heating temperature is room temperature - 220°C, ensuring the strip 7 is heated and conveyed at this temperature. In this invention, the room temperature is 25°C. After constant-temperature heating and conveying, the strip 7 can be drawn out through the constant-temperature conveyor chamber 41. The cooling device 5 includes a cooling chamber 51 through which the strip 7 can pass and a cooling element 52 disposed within the cooling chamber 51. The strip 7, drawn out by the constant-temperature heating and conveying device 4, enters the cooling chamber 51 and is cooled by the cooling element 52 within the chamber 51. The cooling temperature is 7-30°C, allowing the strip 7 within the cooling chamber 51 to cool to room temperature, facilitating transfer during production testing. The winding device 6 includes a winding chamber 61 for introducing the strip 7 and a winding shaft 62 disposed within the winding chamber 61. That is, the strip 7, drawn out from the cooling chamber 51, can enter the winding chamber 61 and be wound up by the winding shaft 62, achieving the unwinding and baking of the strip 7. The vacuum device is used to evacuate the unwinding chamber 21, preheating chamber 31, constant temperature conveyor chamber 41, cooling chamber 51, and winding chamber 61, and can remove moisture from the corresponding working environment to ensure effective moisture evaporation.

[0038] The strip pretreatment equipment provided by this utility model adopts roll unfolding and baking technology. After unwinding, preheating, constant temperature heating and conveying, cooling and rewinding, the baking environment of each point on the strip 7 is consistent, which is more advantageous in terms of the consistency of moisture and thickness of the strip 7, and improves the consistency of the mechanical properties of the strip 7. Moreover, the entire baking process is carried out in a vacuum environment, which makes it easier for the moisture of the strip 7 to be desorbed. The equipment occupies little space and has low energy consumption. The baking time of a single roll can be shortened to less than 30 seconds, which greatly improves the baking efficiency. At the same time, it avoids the problems of easy oxidation of metal foil and expansion and wrinkling of the strip 7 when baking the strip 7 for a long time, which improves the production yield and reduces production energy consumption.

[0039] In some implementations, such as Figure 1As shown, the strip pretreatment equipment also includes a cryogenic device 8, which is used to condense and adsorb the unwinding chamber 21, the cooling chamber 51 and / or the winding chamber 61.

[0040] Specifically, the condensation adsorption treatment of the cryogenic device 8 accompanies the entire baking process of the strip 7, that is, from the start of unwinding the strip 7 to the end of winding and unwinding the strip 7, the unwinding chamber 21, cooling chamber 51 and / or winding chamber 61 where the strip 7 is located are continuously subjected to condensation adsorption treatment. In some embodiments, the temperature of the condensation adsorption treatment is below -120°C.

[0041] This treatment method can reduce the water content in the unwinding chamber 21, cooling chamber 51, and winding chamber 61, creating an environment with extremely low water content.

[0042] In some embodiments, the cryogenic device 8 utilizes its surface's low-temperature condensation capability to rapidly lower its own temperature to below -120°C, quickly adhering residual gas within the vacuum chamber. This significantly shortens the vacuuming time (by 50-80%), while simultaneously achieving a clean vacuum environment, increasing the vacuum level, and reducing the water content in the environment. This facilitates moisture reduction, lowers energy consumption, and improves product quality. The cryogenic device 8 includes a cooling coil and a cryogenic acquisition mechanism 11. The cooling coil is wound inside the unwinding chamber 21, the cooling chamber 51, and / or the winding chamber 61. The cryogenic acquisition mechanism 11 is connected to the cooling coil, enabling the cooling coil to reach a temperature below -120°C. The cryogenic acquisition mechanism 11 can be a cryogenic pump, etc. A cooling coil capable of operating at temperatures below -120°C is placed in the unwinding chamber 21, the cooling chamber 51, and / or the winding chamber 61. Through the low-temperature condensation effect on the surface of the cooling coil, residual gas in these chambers is rapidly captured. This significantly shortens the vacuuming time and achieves a clean vacuum environment.

[0043] In some embodiments, the cryogenic device 8 also includes a heating defrosting mechanism connected to the refrigeration coil. With this design, the cryogenic device 8 can automatically switch heating modes after low-temperature condensation, instantly evaporating the frost formed by residual gases (water vapor, etc.) adsorbed on the surface of the refrigeration coil. Simultaneously, a vacuum pump continuously removes the frost, achieving vacuum desorption of moisture and restoring the temperature. This ensures the refrigeration coil returns to room temperature before each use, preventing the refrigeration coil from absorbing large amounts of water vapor from the atmosphere and frosting after vacuum breaking, which would affect subsequent vacuuming.

[0044] In some embodiments, the strip pretreatment equipment further includes a working gas replacement device for supplying working gas toward the constant-temperature conveyor chamber 41. Specifically, the working gas replacement device supplies working gas toward the location of the constant-temperature heating roller 421 within the constant-temperature conveyor chamber 41. Figure 1 and Figure 3 As shown, the constant-temperature conveyor chamber 41 is equipped with a working gas replacement port 44 for introducing working gas. By introducing dry working gas into the constant-temperature conveyor chamber 41, and removing the evaporated moisture as the working gas is drawn out, the water concentration in the constant-temperature conveyor chamber 41 is reduced, increasing the drying effect of the conveyor belt 7. The working gas replacement device, in conjunction with a vacuum device, maintains the ambient air pressure in the constant-temperature conveyor chamber 41 below 2000 Pa, and the flow rate of the working gas is 100-2000 sccm, enabling the conveyor belt 7 to be heated and conveyed under constant temperature and pressure, ensuring the dehydration effect. In some embodiments, the working gas replacement mechanism can be a working gas replenishment device, that is, a working gas replenishment device supplies dry working gas into the constant-temperature conveyor chamber 41, in conjunction with a vacuum device to maintain the air pressure in the constant-temperature conveyor chamber 41. During the process of introducing working gas, the flow rate of the drying working gas can be controlled by a pressure valve and a throttle valve. At the same time as the working gas is introduced, it is also continuously drawn away, so that the water vapor in the constant temperature conveyor chamber 41 is continuously carried away, and the ambient air pressure in the constant temperature conveyor chamber 41 is kept in dynamic balance.

[0045] In this design, by supplying working gas towards the constant-temperature conveyor chamber 41, the evaporated water vapor inside the chamber flows and is discharged with the working gas, reducing the water concentration in the chamber and increasing the drying effect of the strip 7. Furthermore, because the side of the strip 7 that contacts the heating roller 43 is not a completely flat plane, there will be uneven gaps between the strip 7 and the heating roller 43. The flowing gas will fill these gaps, allowing the strip 7 to be heated more effectively, thus increasing the processing efficiency of the strip 7.

[0046] Based on the strip pretreatment equipment provided in this application, the strip 7 adopts a combination of three technical means during the baking process: condensation adsorption, working gas replacement and vacuum suction. This ensures that the moisture generated during the baking of the strip 7 is discharged in time, so that the environment in which the strip 7 is located gradually dries, thereby increasing the baking efficiency of the strip 7.

[0047] In some embodiments, the preheating element 32 includes an infrared radiation element 321 disposed within the preheating chamber 31. The travel path of the strip 7 conveyed to the preheating chamber 31 bypasses the infrared radiation element 321, and radiative heating is achieved through the infrared radiation element 321 within the preheating chamber 31. Specifically, through the conversion of electrical energy to light energy, infrared light with concentrated energy and high power density is generated. For different materials, by utilizing the penetrating characteristics of infrared light and adjusting the wavelength of the infrared light, the absorption of the heated object can be increased, thereby allowing the heated object to enter the moisture diffusion stage from the inside out earlier, reducing the moisture content and increasing the preheating efficiency.

[0048] In some embodiments, there is at least one set of infrared radiating elements 321, with two infrared radiating elements 321 in each set. The two infrared radiating elements 321 are spaced apart along the vertical direction, and the strip 7 can rotate around the two infrared radiating elements 321 in the same set. Specifically, the preheating chamber 31 is provided with multiple preheating rollers 33. The strip 7 passes over the multiple preheating rollers 33, and the arrangement of the multiple preheating rollers 33 should be such that after the strip 7 passes over the multiple preheating rollers 33, the strip 7 can rotate around the two infrared radiating elements 321, so that the two infrared radiating elements 321 are used to preheat the two sides of the strip 7 respectively, ensuring the preheating effect of the strip 7 and the uniformity of temperature at each position.

[0049] In some embodiments, the preheating chamber 31 is further provided with a first temperature detection mechanism, which detects the surface temperature of the strip 7. By detecting the surface temperature of the preheated strip 7, the preheating temperature is controlled in a closed loop in real time to ensure the preheating effect of the strip 7.

[0050] Under this design, the preheating time of the unwound strip 7 is less than 1 second. The preheating time of the strip 7 can be controlled by the preheating temperature and method (preheating temperature is room temperature - 260℃, preheating method is preheating the strip 7 using infrared radiation element 321). This allows for rapid heating of the strip 7 while meeting its preheating requirements. According to the RD model (Dubinin-Radushkevich model) and the Kelvin equation, a faster temperature rise results in more vapor molecules released per unit time, higher vapor pressure, higher mass transfer efficiency, better desorption, and fewer residual molecules. Therefore, this rapid heating method can increase the evaporation effect of moisture.

[0051] In some implementations, the strip 7 is preheated by contact. This design, which uses contact to heat the strip 7, allows for more accurate temperature control of the strip 7.

[0052] In some implementations, combined Figures 2 to 4As shown, the constant temperature heating element 42 includes multiple constant temperature heating rollers 421 rotatably disposed within the constant temperature conveyor chamber 41. The strip 7 sequentially passes around the multiple constant temperature heating rollers 421, so that the conveying direction can be changed by the constant temperature heating rollers 421, and the strip 7 can be heated in contact by the constant temperature heating rollers 421. The constant temperature heating rollers 421 can adopt intermittent heating or continuous heating, and can be designed according to actual needs.

[0053] For example, the constant-temperature conveyor chamber 41 is also equipped with a second temperature detection mechanism for detecting the temperature of the strip 7. Each constant-temperature heating roller 421 has a second temperature detection mechanism to detect the temperature of the strip 7 at the corresponding position and feed it back to the controller. The controller sends a signal to the constant-temperature heating roller 421 to determine whether to operate based on the temperature detected by the second temperature detection mechanism, thereby achieving automatic heating detection and ensuring that the temperature of the strip 7 at each position is within the constant-temperature conveyor temperature range, ensuring the heating effect of the strip 7. In this method, the constant-temperature heating roller 421 adopts a discontinuous heating mode. When the temperature falls below the set value by a certain deviation, heating is activated, and intermittent heating maintains a stable temperature, reducing energy consumption. Alternatively, the constant-temperature conveyor chamber 41 may not have a second temperature detection mechanism; in this case, the constant-temperature heating roller 421 adopts a continuous heating mode. These are not limiting factors.

[0054] In some embodiments, multiple constant-temperature conveyor belt chambers 41 are arranged in parallel, and each constant-temperature conveyor belt chamber 41 is equipped with multiple constant-temperature heating rollers 421. In this design, the multiple constant-temperature conveyor belt chambers 41 are independently arranged, which facilitates vacuuming and control of the vacuum level.

[0055] In some implementations, combined Figure 2 and Figure 3 As shown, the constant temperature conveyor belt chamber 41 is equipped with two constant temperature heating rollers 421. The two constant temperature heating rollers 421 are arranged at intervals along the vertical direction. The strip 7 is folded back and passes around the two constant temperature heating rollers 421 so that the two constant temperature heating rollers 421 heat the two sides of the strip 7 respectively, so as to ensure the heating effect of the strip 7 and the uniformity of temperature at each position.

[0056] In some embodiments, the constant-temperature conveying chamber 41 is equipped with heated rollers 43 for changing the travel path of the strip 7. The strip 7 bypasses multiple heated rollers 43 during conveying to change its conveying path, and the heated rollers 43 also tension the strip 7. Some of the heated rollers 43 are positioned opposite the constant-temperature heating roller 421 to press the strip 7 against it, ensuring a good fit and thus ensuring effective heating. The constant-temperature conveying chamber 41 also includes a heat-directing reflection device 45, which includes a heat-reflecting plate 451. The heat-reflecting plate 451 is positioned opposite the constant-temperature heating roller 421, specifically on the side of the strip 7 away from the constant-temperature heating roller 421, to prevent heat diffusion, increase the temperature between the constant-temperature heating roller 421 and the heat-reflecting plate 451, and enhance the evaporation of moisture from the strip 7. The material of the heat reflector 451 is not limited, as long as it can improve the utilization rate of heat energy and reduce heat waste. It can be designed according to actual needs.

[0057] Under this design, the constant-temperature heating and conveying time of the preheated strip 7 can be less than 15 seconds. The constant-temperature heating and conveying time of the strip 7 can be controlled by the constant-temperature heating temperature. Thus, when the constant-temperature heating temperature meets the moisture evaporation requirements of the strip 7, the moisture evaporation efficiency of the strip 7 can be increased, the constant-temperature heating and conveying time of the strip 7 can be reduced, and the economic efficiency of the strip 7 processing can be improved.

[0058] In some implementations, such as Figure 5 As shown, the cooling component 52 includes two driving mechanisms 522 and cooling rollers 521 respectively mounted on the two driving mechanisms 522. A gap is formed between the two cooling rollers 521, allowing the strip 7 to pass through. The two driving mechanisms 522 can drive the two cooling rollers 521 closer or further apart, thereby changing the thickness of the strip 7. This method of cooling the strip 7 by cold pressing contact has a contact cold pressing pressure of 0.5-1.5 tons and a cold pressing thickness of 10-500 μm. The cooling component 52 also includes a third temperature detection mechanism and a thickness detection mechanism. The third temperature detection mechanism is used to detect the surface temperature of the strip 7, and the thickness detection mechanism can detect the thickness of the strip 7 in real time.

[0059] In this design, the temperature of the strip 7 surface can be detected and fed back in real time by the third temperature detection mechanism to control the cooling temperature of the cooling roller 521, and the thickness can be controlled in real time by the thickness detection mechanism to control the electrode thickness, thereby achieving control of the temperature and thickness of the strip 7.

[0060] In some embodiments, the drive mechanism 522 employs a hydraulic system or an electric actuator, wherein the hydraulic system includes a hydraulic cylinder capable of driving a hydraulic rod to extend or retract, and the electric actuator includes a drive cylinder and a telescopic rod, wherein the drive cylinder can drive the telescopic rod to extend or retract. The cooling roller 521 is rotatably mounted on a roller seat. The hydraulic system or electric actuator can drive the roller seat and the cooling roller 521 to move, thereby adjusting the gap between the two cooling rollers 521 and the pressure acting on the strip 7, increasing the ease of adjustment.

[0061] In some embodiments, the strip 7 is cooled by contacting the cooling roller 521 with the strip 7.

[0062] Specifically, a cooling roller 521 is rotatably installed inside the cooling chamber 51, and the strip 7 is conveyed around the cooling roller 521 so as to cool the strip 7 through the cooling roller 521.

[0063] This design achieves heat exchange through physical contact, enabling the strip 7 to cool down quickly, facilitating production testing and transfer, and allowing the strip 7 to cool to room temperature for easy transport to the next process.

[0064] In some implementations, such as Figure 1 As shown, the vacuum device includes a vacuum measuring mechanism, a vacuum obtaining mechanism 1, a vacuum controlling mechanism, and a vacuum breaking mechanism.

[0065] The vacuum measurement mechanism includes multiple vacuum detection elements, one of which is installed in each of the unwinding chamber 21, preheating chamber 31, constant temperature conveyor chamber 41, cooling chamber 51, and winding chamber 61 to detect the vacuum status of the corresponding chamber. The vacuum detection element can be a vacuum level detector, a conventional component used to detect the vacuum environment within the chamber; its structure and working principle are not described in detail here.

[0066] The vacuum mechanism 1 is connected to the vacuum ports 12 on the unwinding chamber 21, preheating chamber 31, constant temperature conveyor chamber 41, cooling chamber 51 and winding chamber 61 respectively through vacuum pipes. The vacuum mechanism 1 includes a vacuum pump, and the other end of the vacuum pipe is connected to the vacuum pump so that the unwinding chamber 21, preheating chamber 31, constant temperature conveyor chamber 41, cooling chamber 51 and winding chamber 61 are evacuated by the vacuum pump. The vacuum pipe is equipped with a valve so that the opening and closing of the vacuum pipe can be controlled by the valve.

[0067] The vacuum breaking mechanism is connected to the vacuum breaking ports 13 on the unwinding chamber 21, preheating chamber 31, constant temperature conveyor chamber 41, cooling chamber 51 and winding chamber 61 through vacuum breaking pipes. Dry working gas can be delivered to the unwinding chamber 21, preheating chamber 31, constant temperature conveyor chamber 41, cooling chamber 51 and winding chamber 61 through the vacuum breaking pipes, so that the corresponding chambers return to normal pressure. The vacuum breaking pipes are equipped with valves, which can control the opening and closing of the vacuum breaking pipes.

[0068] The vacuum control mechanism includes a controller, which can adjust the opening of the vacuum pump in real time according to the vacuum status of the corresponding chamber detected by the vacuum detector, so as to pump the corresponding chamber to a preset vacuum level.

[0069] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model. Therefore, this utility model is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features of the utility model described herein.

Claims

1. A strip pretreatment device, characterized in that, include: The unwinding device (2) includes an unwinding chamber (21) capable of leading out the strip (7); The preheating device (3) includes a preheating chamber (31) through which the strip (7) passes and a preheating element (32) disposed in the preheating chamber (31); The constant temperature heating conveying device (4) includes a constant temperature conveying chamber (41) through which the strip (7) can pass and a constant temperature heating element (42) disposed in the constant temperature conveying chamber (41); The cooling device (5) includes a cooling chamber (51) through which the strip (7) passes and a cooling element (52) disposed in the cooling chamber (51); The winding device (6) includes a winding chamber (61) capable of introducing the strip (7); and A vacuum device is used to evacuate the unwinding chamber (21), the preheating chamber (31), the constant temperature conveyor chamber (41), the cooling chamber (51), and the winding chamber (61).

2. The strip pretreatment equipment according to claim 1, characterized in that, The strip pretreatment equipment also includes a cryogenic device (8), which is used to condense and adsorb the unwinding chamber (21), the cooling chamber (51) and / or the winding chamber (61).

3. The strip pretreatment equipment according to claim 2, characterized in that, The cryogenic device (8) includes a refrigeration coil and a cryogenic acquisition mechanism (11). The refrigeration coil is wound inside the unwinding chamber (21), the cooling chamber (51) and / or the winding chamber (61). The cryogenic acquisition mechanism (11) includes a cryogenic pump connected to the refrigeration coil.

4. The strip pretreatment equipment according to claim 3, characterized in that, The cryogenic device (8) also includes a heating defrosting mechanism, which is connected to the refrigeration coil.

5. The strip pretreatment equipment according to claim 1, characterized in that, The strip pretreatment equipment also includes a working gas replacement device for supplying working gas toward the constant temperature strip-carrying chamber (41).

6. The strip pretreatment equipment according to claim 1, characterized in that, The preheating component (32) includes an infrared radiation element (321) disposed in the preheating chamber (31), and the travel path of the strip (7) conveyed to the preheating chamber (31) bypasses the infrared radiation element (321).

7. The strip pretreatment equipment according to claim 6, characterized in that, The infrared radiation element (321) is at least one set, and each set of the infrared radiation element (321) consists of two elements. The two infrared radiation elements (321) are arranged at intervals along the vertical direction, and the strip (7) can rotate around the two infrared radiation elements (321) in the same set.

8. The strip pretreatment equipment according to claim 1, characterized in that, The constant temperature heating element (42) includes multiple constant temperature heating rollers (421) rotatably disposed in the constant temperature conveyor chamber (41), and the strip (7) passes around the multiple constant temperature heating rollers (421) in sequence.

9. The strip pretreatment equipment according to claim 8, characterized in that, The constant temperature conveyor belt chambers (41) are arranged in parallel, and each constant temperature conveyor belt chamber (41) is provided with multiple constant temperature heating rollers (421).

10. The strip pretreatment equipment according to claim 8, characterized in that, The constant temperature conveyor chamber (41) is provided with two constant temperature heating rollers (421), which are arranged at intervals along the vertical direction. The strip (7) is folded back and passes around the two constant temperature heating rollers (421).

11. The strip pretreatment equipment according to claim 8, characterized in that, The constant temperature conveyor belt chamber (41) is also equipped with a heat energy directional reflection device (45), which includes a heat energy reflector plate (451) and is arranged opposite to the constant temperature heating roller (421).

12. The strip pretreatment equipment according to claim 1, characterized in that, The cooling component (52) includes two drive mechanisms (522) and cooling rollers (521) respectively disposed on the two drive mechanisms (522). A gap is formed between the two cooling rollers (521) for the strip (7) to pass through. The two drive mechanisms (522) can drive the two cooling rollers (521) to move closer or further away.

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